Telecom Training & Learning
3GPP Releases: TR 21.915 Release 15 Description: Summary of Rel-15 Work Items (PDF)TR 21.916 Release 16 Description: Summary of Rel-16 Work Items (PDF)TR 21.917 Release 17 Description: Summary of Rel-17 Work Items 5GNR Protocol Layer: TS 38.300 NR: Overall description; Stage-2 (PDF) V17 | V16 | V15 PHY: TS 38.201 NR: Physical layer; General description (PDF) V17 | V16 |
» Read more5GNR Protocol Layer: TS 38.300 NR: Overall description; Stage-2 (PDF) V17 | V16 | V15 PHY: TS 38.201 NR: Physical layer; General description (PDF) V17 | V16 | V15 TS 38.202 NR: Services provided by the physical layer (PDF) V17 | V16 | V15 TS 38.211 NR: Physical channels and modulation (PDF) V17 | V16 | V15 TS 38.212 NR:
» Read moreBase Station: Base Station Specs (gNB) TS 38.104 NR: Base Station (BS) radio transmission and reception (PDF) V17 | V16 | V15 TS 38.113 NR: Base Station (BS) ElectroMagnetic Compatibility (EMC) (PDF) V17 | V16 | V15 Base Station Conformance TS 38.141-1 NR: Base Station (BS) conformance testing Part 1: Conducted conformance testing (PDF) V17 | V16 | V15 TS
» Read moreUser Equipment (UE): UE Specs TS 38.101-1 NR: User Equipment (UE) radio transmission and reception; Part 1: Range 1 Standalone (PDF) V17 | V16 | V15 TS 38.101-2 NR: User Equipment (UE) radio transmission and reception; Part 2: Range 2 Standalone (PDF) V17 | V16 | V15 TS 38.101-3 NR: User Equipment (UE) radio transmission and reception; Part 3: Range
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To enable devices to find a cell when entering a system, as well as to find new cells when moving within the system, a synchronization signal consisting of two parts, the Primary Synchronization Signal (PSS) and the Secondary Synchronization Signal (SSS), is periodically transmitted on the downlink from each NR cell.
The PSS/SSS, together with the Physical Broadcast Channel (PBCH), is jointly referred to as a Synchronization Signal Block or SS block
The PSS is transmitted in the first OFDM symbol of the SS block and occupies 127 subcarriers in the frequency domain. The remaining subcarriers are empty.
• The SSS is transmitted in the third OFDM symbol of the SS block and occupies the same set of subcarriers as the PSS. There are eight and nine empty subcarriers on each side of the SSS.
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The CORESET configuration obtained from the PBCH also defines and activates the initial bandwidth part in the downlink.
The initial active uplink bandwidth part is obtained from the system information scheduled using the downlink PDCCH.
Once connected, a device can be configured with up to four downlink bandwidth parts and up to four uplink bandwidth parts for each serving cell.
On each serving cell, at a given time instant one of the configured downlink bandwidth parts is referred to as the active downlink bandwidth part for the serving cell and one of the configured uplink bandwidth parts is referred to as the active uplink bandwidth part for the serving cell.
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A bandwidth part is characterized by a numerology (subcarrier spacing and cyclic prefix) and a set of consecutive resource blocks in the numerology of the BWP, starting at a certain common resource block.
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Reference point A coincides with subcarrier 0 of common resource block 0 for all subcarrier spacings. This point serves as a reference from which the frequency structure can be described.
» Read moreThe 5G NR numerology for the carrier is similar to LTE includes subcarrier spacing (SCS) and CP.
15 kHz Subcarrier Spacing (SCS) is not enough and multiple larger SCS values with 2^μ × 15 kHz, where μ = 0, 1, 2, 3, 4 were introduced for the mobility requirement supporting up to 500 km/h.
» Read moreFrequency bands within the scope of Release 15 in 3GPP are divided into two frequency ranges:
Frequency range 1 (FR1) includes all existing and new bands below 6 GHz.
Frequency range 2 (FR2) includes new bands in the range 24.25 – 52.6 GHz.
The frequency bands where NR will operate are in both paired and unpaired spectra, NR supports both FDD and TDD operation
The Carrier bandwidth available in frequency ranges FR1 and FR2 are given in the table:
Release 15 of the 3GPP specifications for NR includes 26 operating bands in frequency range 1 and three in frequency range 2.
Bands Defined by 3GPP for NR in Frequency Range 1:
Bands Defined by 3GPP for NR in Frequency Range 2
